Internal combustion engine



O. C. KREIS INTERNAL COMBUSTION ENGINE Filed March 5, 1928 INVENTOR.

asaar 6'.

ATTORNEY.

Patented Aug. 30, 1932 UNITED STATES PATIENT OFFICE,

oscan 0. Kane, or DETROIT, MICHIGAN, ASSIGNQR To CONTINENTAL MOTORS conroaaTromor DETROIT, MICHIGAN, A CORPQRATION or VIRGINIA INTERNAL COMBUSTION ENGINE Application filed March 5,

This invention relates to internal combustion engines and'refers more particularly to sleeve valve and like types of engines. In this general class of engines it is customary to provide a cylinder head or other structure spaced within the cylinder to form a pocket receiving one or more sleeve valves. 'Incertain well known types of sleeve valve engines such as the Knight or the Burt-McCollum for 1o example, the sleeve ports are moved into." the sleeve pocket usually during the firing of the charge whereby the sleeve ports arecooled. It is known that the sleeve pocket tends to accumulate what is generally known as sludge, being in" the nature of carbon, oil, residue constituents of the intake and exhaust gases, and the like. Ithas heretofore been necessary to periodically remove the sludge accumulation by dismantling the cylinder head and scraping away the deposit since the accumulation interferes with the proper-operation of the sleeve valves, produces overheat ing in the region of the sleeve pocket, and otherwise interferes with the desired efiicient and smooth running qualities ofthe engine. I have invented means for removing the matter which finds its wayto the sleeve 1 pocket. If such matter is removed periodically it may be disposed of withoutdifliculty according to my invent-ion, preferably before any great accumulation is experienced in the sleeve pocket. When permitted to accumulate this matter is acted upon by the heat of the engine and in time carbonizes and becomes heavily incrusted in the sleeve pocket.

' My invention provides for periodically removing the sludge by means preferably automatically responsive to operation of the engine whereby the sleeve pocket will be main- 0 tained substantially free from the objectionable deposits. I prefer to provide suction means acting periodically as aforesaid as I have found that in general a suction when applied constantly-to the sleeve pocket tends to produce an undue accumulation of sludge in the pocket whereas a periodic suction does not in thisrespect appreciably alter the normal operating conditions of the engine.

A further feature of my invention resides in the provision ofnovel means for inducing 192a. semu No. 259,018.

and controlling the suction for withdrawin the sludge from the sleeve pocket. Thus have provided means for effecting the suction by an auto-extraction effect, utilizing the exhaust gases.

Referring? to the accompanying drawing illustrating one embodiment of my invention,

Fig. 1 is a sectional elevation View through atypical sleeve valve engine illustrating my invention, and

Fig. 2 is a diagrammatic development of the cylinder and sleeve valve ports.

In the drawing reference character A represents the engine cylinder block having one or morecylinders 10. The cylinder is closed by a cylinderhead Bhaving a portion 11 depending within andspaced from the cylinder walls to form an annular sleeve pocket 12. This sleeve pocket receives one or more sleeve valves ported and actuated according to the type of sleeve valve engine used. For illus tration I have shown my invention in connection with the Burt-McCollum type of sleeve valve engine in which a single sleeve valve 13'is' actuated by any'suitable mechanism with a combined reciprocating and oscillating movement whereby any point on the sleeve such as the point '14 traces a closed curve path such as 14 with respect to the cylinder walls. The cylinder A has suitable intake and exhaust ports 15 and 16 respectively cooperating with the sleeve intake and exhaust ports 17 and 18, the sleeve valve being driven at half engine speed for the usual four stroke cycle engine. I

' The cylinder block A is provided with the exhaust chamber 19 open to the exhaust ports 16 whereby the exhaust gasesare conducted from the engine working chamber 20. In

order to utilize the extraction effect of the exhaust gases for producing a suction to remove the sleeve pocket sludge, I have provided a conduit 21 open to the chamber 19 and communicating at 22 with the sleeve pocket 12. I prefer to locate the opening 22 so that the sleeve valve will uncover the opening during at least a portion of the exhaust cycle and preferably toward the latter part of the exhaust. Thus in Figs. 1 and 2 the working chamber 20 is exhausting, the ports 18 and 16 suction is effected by the exhaust: gases in the nthesleevepocket .12.i....As..the cycle continues 7 the sleeve exhaust ports 18' clear. the cylinder exhaust ports 16 and intake occurs. The sleeve valve then moves generally-upwardly to its extreme upper position 23 for compression and firing andjtheneafter exhaushagai-n :17 takes place completing the cycle.

In the illustrated embodiment "of my inventi on conduit Qlat a predetermined poi-nt in-each eycle 'ofthe engine,it being neadilyxunden stood that the degree of suction maybe: va-i ried as by changing the location of=theropen ing 22. Furthermore the:sludge is'd-isposed r of through the usual"exhaustisystem for the enginew Ifdesired .thesuotion: may. readily be arranged to act throughout.thecompletei exhaustportionrofrtheeycle.

While 'Iihave i'llustrat ed my' invention in connection with s theQsingler SleeVeZ Burt-Mc- Collum type: of engine; iit'will (be: apparent the cylinder, a sleeve :pocketistnucture accommodating the sleeve valve means, aiconduit. communicating with the sleeve :pocketgzand meansainducing a suction in' said conduit only during'at.leastapoistion of-the e'xhaustx'cyolea cy-lin der; sleeve ivalve means:1associ ated' with that the teachings 0t myfiinventionr-arealso adaptable to'. advantage-:iin*other types of. sleeve "alve en gines,=:or .inengines having sleeve pockets 5. or; generally 1 similar pocliets I \Vhat I'iclaim a'simy invention'is: 3-. 1. In an enginetofthesleeveivalvetyp -a" lcylinder, E sleeve valve zmeatns associated with.

1 2: In'an eng-inet'of thesleeve'valvetyipe, a

thefcylinder, a sleevepocket structure accommodaitingthe' sleeveival-ve means,andimeans removing sludge: fnonrasaid pocket-only dur-j at least a portion'iofzthe'exhaust' cycle.

3. In an engineiof ithe' sleeve valve type, a

cylinder; a :sleevevalve associated with: the 3 cylinder having a combined reoiprocating and oscillating movement, a sleeve pocket struc- 1' 1 ture for :the: upper send? of the sleeve ,"said "sleeve and cylinder :lravin tcooperating in- 1 take and exhaustports; anrl'fa sludge conduct-1 ing conduit having anf=opening into the sleeve j pocket adapted to be unc'overed'bythe sleeveduring a 'downward m'ovement thereof;

IIJ

' structure for the upper end ofthe-sleeve, saidm sleeve and cylinderhavingcooperating infitake and exhaust ports, and a sludge conducting conduithaving'an opening into' the 'sleeve'pocket, exhaust 'gaszoutlet means, a con- "duit communicating with the? exhaust i gas outletmeans; and an :inlet port .for saidLcOnduit opening: into'the sleeve pocket and in communication therewith: only during the latter portion oi ::the exhaust: l'cycle: of: the engine:

7. A sleeve valve "engine :comprising in combination, acylinder, a: sleeve pocket structure, sleeve valve meansoperableiinithe. sleeve pocket, exhaust gas outlet: :means; a conduit communicating with pthex'exhaust gas outlet means, and an inletuport for-"said conduit opening into the sleeve.p.ocket,said; conduit inlet port being corrtrolledbythe sleeve vakve means. t

8. In anengine, a cylinder block, asleeve pocket structure, sleeve :VEL'lVeiT means? within said sleeve pocket, an 'exhausttchambenwithin theLcylinder block, and azrconduiti within the cylinder block intermediate :the :exhaust 'chamberand sleeve pocket adaptedtoexert a modating the sleeve -valve means, *a-conduit communicating with" the sleeve pocket-,cand means: inducing a'suction insaid'conduitonly during 'thelast portion of the exhaust cycle.

10. In'an engine of the sleeve valve type, a

cylinder, sleeve valve meansiassociat'edwith the cylinder, a sleevepocket structure accommodating the sleeve valve means, and means removing sludge from said pocket only'duringstheilast portion of-the exhaust cycle.

11 In an engine ofthe sleeve valve type, a

cylinder, sleeve valve means. .associatednwith thecylinder, a sleeve'pocket structure, ex.- haust gas passage means, and means including a conduit fen periodically placing. the sleeve-pocket in communication with-the exhaust gas passage means.

12. In an engine of. the sleeve valve type, a'cylinder; sleeve-valve means-associated'with the cylinder,- a sleeve pocket structure, exhaust gas passage means, andi-meanstin'clud i-ng a conduit for periodicallyi:pla'cing the sleeve pocket-in communieationwith; the exhaust 13. In an engine of the sleeve valve type acylinder, sleeve valve means associate as passage means during a portion only 0 the exhaust cycle.

with the cylinder, a sleeve pocket structure, exhaust gas passage means, and means controlled by the sleeve valve means and including a conduit for periodically placing the sleeve pocket in communication with the exhaust gas passa e means.

In witness w ereof, I hereunto subscribemy name this 29th day of February, A. D.

OSCAR C. KREIS. 

